Portable air pump with a pressure gauge receivable by biasing

Abstract

A portable air pump includes a head member located on one end of the pump body thereof and having a beveled face, a biasing member carrying a pressure gauge and having a beveled face pivotally connected to the beveled face of the head member in such a manner that the biasing member is biasable relative to the head member between a received position where the biasing member is kept in axial alignment with the portable air pump and an extended position where the pressure gauge is kept facing toward the handle of the portable air pump convenient for reading by the user and the biasing member is workable as a footplate for supporting the portable air pump on the floor for use as a floor type air pump.

What is claimed is: 
     
       1. A portable air pump, comprising:
 a head member located on one end of the portable air pump, said head member comprising a beveled face and pivot means extending perpendicularly from the beveled face of said head member; 
 a biasing member, said biasing member comprising a beveled face fitting the beveled face of said head member and pivot means located on the beveled face of said biasing member and extending in a perpendicular direction relative to the beveled face of said biasing member and coupled with the pivot means of said head member in such a manner that said biasing member is biasable relative to said head member between a received position where said biasing member is kept in axial alignment with the portable air pump and an extended position where said biasing member is kept in a perpendicular or quasi-perpendicular position relative to the portable air pump; and 
 a pressure gauge installed in said biasing member. 
 
     
     
       2. The portable air pump as claimed in  claim 1 , wherein the beveled face of said head member and the beveled face of said biasing member slope at 45-degrees angle. 
     
     
       3. The portable air pump as claimed in  claim 1 , further comprising a supplementary member affixed to one side of said biasing member opposite to said pressure gauge, said supplementary member being kept close to the portable air pump when said biasing member is biased to said received position, said supplementary member being kept in a perpendicular position relative to the portable air pump and partially extending out of said biasing member to work as a foot plate when said biasing member is biased to said extended position. 
     
     
       4. The portable air pump as claimed in  claim 1 , wherein the pivot means of said head member is a pivot shaft defining an axially extending through hole in communication with a passage in the portable air pump; the pivot means of said biasing member is a pivot hole coupled with the pivot shaft of the pivot means of said head member; said biasing member further comprises a through hole in communication between said pivot hole and said pressure gauge. 
     
     
       5. The portable air pump as claimed in  claim 1 , wherein the portable air pump comprises: a pump body made in a cylindrical shape and having one end thereof connected with said head member; a piston mounted in said pump body; a piston rod having one end thereof fixedly connected to said piston and an opposite end thereof extended out of said pump body; a handle fixedly connected the opposite end of said piston rod outside said pump body; an air duct pivotally connected to said head member; a flexible tube having one end thereof connected to said air duct; and an air-charging connector located on an opposite end of said flexible tube remote from said air duct. 
     
     
       6. The portable air pump as claimed in  claim 1 , wherein the portable air pump comprises: a pump body made in a cylindrical shape and having one end thereof connected with said head member; a piston mounted in said pump body; a piston rod having one end thereof fixedly connected to said piston and an opposite end thereof extended out of said pump body; a handle fixedly connected the opposite end of said piston rod outside said pump body; an air duct pivotally connected to said biasing member; a flexible tube having one end thereof connected to said air duct; and an air-charging connector located on an opposite end of said flexible tube remote from said air duct.